Parameterizing the same part in an assembly

I'm looking to set up a single part in an Inventor 2019 assembly.

Let me explain, I have a basic piece, a simple wooden tile whose length varies
I want to integrate this blank several times in the same assembly with a different length without having to make a new part for each length.

Thank you for your help.

You have to look for the families of parts: tuto pdf

It's perfect...
Thank you